• The Korean Journal of Zoology
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• v.39 no.2
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• pp.223-230
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• 1996

Fine structure of the neuromuscular junction in the venomous organ of the spider, Agelena li'mbutq, was studied using high magnification electron microscope. The motor nerve endings at neuromuscular contact area composed of neurons and neuroslial cells were located between musculature and extracellular sheath of the venom gBand. At the synaptic contact between a motor axon and a muscle fiber in the musculature, spherical synaptic vesicles were prominent in the nerve terminal. The sarcoplasm beneath the neuromuscular synapse has a granular appearance and lacks mvofilaments. And the main axon gives off a branch between the muscle fibers. The synaptic regions of this organ are located close to the myofilaments unlike to other chelicerate classes. Moreover the postsvnaptic complex of vesicles and membrane invasinations present in other synaptic legions are absent from these legions in this venomous organ.

• The Korean Journal of Zoology
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• v.35 no.4
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• pp.439-447
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• 1992

거미류의 독선에서 분배되는 독액(venom)은 생성지는 위치에 따라 독물질과 점액물질의 두가지 종류로 구분되었다. 선 분비부의 전부와 분비 관에서 분비되는 독물질은 전자밀도가 높은 구형 과립의 형태로 합성된 후, 부분분비에 의해 내강으로 방출되었고, 선분비부의 후부에서 생성되는 점액물질은 커다란 덩어리의 형태로 집적된 후, 세포질의 일부와 함께 이출분비의 기작에 의해 방출되었다. 이들은 공통적으로 선상피세포에 발달된 조면소포체와 골지복합체를 거쳐서 생성되었으며, 분비물질의 성숙 단계에 따라 다양한 형태적 변이가 관찰되었다.

• Applied Microscopy
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• v.33 no.4
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• pp.315-323
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• 2003

The fine structural characteristics of the spinnerets and spigots of the silk producing apparatus in the adult funnel-web spider, Agelena limbata, were analysed with the light and scanning electron microscopes. Silk producing apparatus of this spider was composed of three pairs of spinnerets (anterior, median, posterior) and four different types of spigots-ampullates, tubuliforms, pyriforms and aciniforms. By the examination of their ultrastructural characteristics, it has been revealed that each spigot on the spinnerets are connected through the typical silk gland within abdominal cavity. Among the three pairs of spinnerets, the posterior pairs were highly elongated and has most characteristic features. Two pairs of large ampullates were connected to anterior spinneret and another two pairs of small ampullates to median spinnerets. Spigots of the tubuliforms were observed only in female and were connected both of median and posterior spinnerets respectively. While spigots of the pyriforms were connected on the anterior spinnerets but aciniforms on both of median and posterior spinnerets respectively.

• Animal cells and systems
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• v.12 no.2
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• pp.109-116
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• 2008

Among the four kinds of silk glands in the funnel-web spider Agelena limbata, the ampullate gland for dragline silk production is the most predominate one in both sexes, and is composed of three functional parts-excretory duct, storage ampulla and convoluted tail regions. Two pairs of major ampullate glands send secretory ductules to the anterior spinnerets, and another two pairs of minor ampullate glands supply the middle spinnerets. There are no apparent differences between the major and minor ampullate glands not only the external spigots but also their internal silk glands. However, the microstructure is very unique in this spider, because each gland has spherical shaped storage sac with twig-like branched tails. Nevertheless, the wall of the secretory region is similarly composed of a single layer of epithelial cells. The mature secretory silks in glandular epithelium are closely packed and accumulated as electron-opaque vesicles. Most of the secretory products which originated from the rough endoplasmic reticula(rER) are grown up by fusion with the surrounding small vesicles however, the Golgi complex does not seem to play an important role in this process of secretion.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.05a
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• pp.49-49
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• 2001

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.11a
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• pp.164-164
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• 2001

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2002.11a
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• pp.106-106
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• 2002

• Proceedings of the Zoological Society Korea Conference
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• 2001.04a
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• pp.67.2-67
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• 2001

No Abstract, See Full Text

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2001.11a
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• pp.105-105
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• 2001

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.180.2-180
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• 2000

No Abstract, See Full Text